Tsla nd Surrey — Marine A Igae. 15 101 



Myrionema saxieolum Kuek. 

 Some very beautiful specimeiifi of this rare plant were found on limpet - 

 shells on Clare Island in October, 1910. The sporangia and filaments 



slightly larger than in the Heligoland material, but Dr. Kuekuek tells me it 

 is undoubtedly the - 5] 



M. reptans I - 

 - /' j ptans Cronan; Aseoeydus reptans Reinke j Phyeoedis rtpttms 



Kjellm.; Chilwnema reptans Sauv. : ffecatmema rtpttms S -atonema 



Kylin'. 

 Though no one has thrown more light on the Myrionemaeeae than 

 Professor Sauvagean, a tew alterations with regard to his ■■ Mcmoire 

 been found necessary. The present plant proves to be a Myrionema. and not 

 a Chilionema : hence Foslie*s name is restored. It is frequent in the south 

 of England on Fueus spp,, but is apparently rare in Co. Mayo, having been 

 searched for on many occasions, but found once only. 



Ulonema rhizophonim Fosl. 



1: ;< most probable that Ulonema is merely a form of M. <iranavtans 

 occurring on Thunontia, but some curious stages occasionally found make one 

 hesitate to reduce it till the point has been more thoroughly investigated. 



Hecatonema reptans Kylin | us reptans Kjellm., Don Cronan) : 



\onema reptans De Toni), 



The full synonymy of this species and M. *pta a will be given in the 

 Monograph. SuMiee it to say here that I have examined Kjellinan*s type, and 

 there is no doubt that it should be placed in Hecatonema. It is not 

 uncommon in our district on Cladopkora tstris, 



H. speciosum Cotton, com", nov. (= Jfyrionsma soanontm Borg. ; Hecatontma 

 diffusum Kylin), 



The type-specimens of both these plants have been examined ; and it is 

 quite clear that If. diffktsum Kylin is an early stage of Forgesen's M. sivciosum. 

 Hecatonema is. however, the most suitable genua The plant is common in 

 the British Isles, especially in spring, and was noted frequently in Clare 

 Island on a variety of plants during both the April trips. 



Microspongium globosum Reinke (= Myrixmm ..•: Fosl. ; Hecatonema 



globosum Batters). 

 A difficult species to place ; but when well grown it is evident that it is 

 most suitably located in the genus Mierospongium. 



R.I. A. PROC, VOL. XXXI. Q 15 



